Finding the Fourth Proportional to 651.99, 899.88 and 390.18
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Solution
The fourth proportional to 651.99, 899.88 and 390.18 is: 538.53
Step by Step Solution
- Step 1: Write the proportion equation
651.99 : 899.88 = 390.18 : x - Step 2: Convert to fraction form
651.99/899.88 = 390.18/x - Step 3: Cross multiply
651.99x = 899.88 × 390.18 - Step 4: Simplify right side
651.99x = 351,115.18 - Step 5: Solve for x
x = 351,115.18/651.99 - Step 6: Final answer
x = 538.53
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.